Patch

diff --git gcc/doc/extend.texi gcc/doc/extend.texiindex 986cc94..b564ade 100644--- gcc/doc/extend.texi+++ gcc/doc/extend.texi@@ -1592,6 +1592,18 @@ Jumping or breaking out of the scope of the array name deallocates the
storage. Jumping into the scope is not allowed; you get an error
message for it.
+@cindex variable-length array in a structure+As an extension, GCC accepts variable-length arrays as a member of+a structure or a union. For example:++@smallexample+void+foo (int n)+@{+ struct S @{ int x[n]; @};+@}+@end smallexample+
@cindex @code{alloca} vs variable-length arrays
You can use the function @code{alloca} to get an effect much like
variable-length arrays. The function @code{alloca} is available in